joseph cote



(ModeL) I N; J. COTE.

LOGK.

Patented Apr.17,1883

N. PUERS. Pholvmhagraplwr. wmin m. n. l,

UNITED STATES PATENT OFFICE,

N. JOSEPH COTE, OF MONTREAL, QUEBEC, CANADA, ASSIGNOR'OF ONE-HALF TO JEAN BAPTISTE LENOIR HOLLAND, JR, OF SAME PLACE.

LOCK.

SPECIFICATION forming part of Letters Patent No. 276,004, dated April 17, 1883. Application filed October 2, 1882. (ModeL) To all whom it may concern:

Be it known that I, NAPOLEON JOSEPH COTE, of the city of Montreal, in the district of Montreal and Province of Quebec, in the 5 Dominion of Canada, have invented certain new and useful Improvements in Locks; and I do hereby declare that the followingis a full, clear, and exact description of the same.

This invention has reference to that class Io f locks which are particularly adapted for drawers, cupboards, and other situations'where access for the key is only required from one side. Its object is to simplify and cheapen the article by doing away with wards, tum- I blers, and springs, and to insure perfect safety and greater convenience than is attained in the majority of the cheaper classes of locks now in use.

The invention may be stated as consisting in a bolt resting and sliding on the back plate and working through an aperture in the rim, and provided with two slots, in combination with a revolving front plate, which has pro-- jecting from its inner side apin to workin one 2 slot in the bolt, and provided with a screw or rivet passing through same and through the other slot in the bolt and screwed or riveted into the back plate, and a loose key-plate revolvinginside asuitable escutcheon. The key- 0 plate has an aperture suited to the section of the key, and the front plate is provided with two or more holes, into which points or projections from the key fit to move the bolt.

Certain details and modifications are included in my invention, for a full comprehension of which reference must be had to the accompanying drawings, in which letters similar to those used in this specification indicate like parts, and where- Figure 1 is a view looking at front plate of my lock provided with a bolt which can be moved by turning the key in either direction. Fig. 2 is an end view of same. Fig. 3 is a view of bolt and front plate, the back plate 5 having been removed. Fig. 4. is a vertical section of my lock, representing the bolt shot out. Fig. 5 is a section showing connection of key with front plate and revolving keyplate. Fig. 6 is adetail view ofa bolt adapted to be operated by turning the key only in one 0 direction.

Letter A is the back plate of the lock, and it its rim.

B is the bolt, made of any thickness and contour desired, but provided with two slots, 5 b I), preferably situated at right angles to each other.

C represents the revolving front plate of the lock, between which and the back plate, A, the bolt B slides. This front plate'is preferably secured to the back plate by a screw or rivet,

c, which passes from one to the other through the slot b in the bolt.

0 is a pin projecting from inside of the front plate and working in the slot b of the bolt.

c t are holes or recesses formed in the front plate, C, intowhich the projections c c of the key D fit when the loose key-plate E has been revolved to the proper extent. This key-plate has a slit, 0, for the key, and is placed inside the escutcheon F, which is cast in one with or secured to the front plate, C.

The operation of my invention will be so clearly understood from the foregoing as to need very little explanation, further than to 7 5 say that when the key D is inserted in its slit in the key-plate it is revolved until the holes 0 c are reached, into which the projections on the key are pressed. The key is then turned, and with it the front plate, and, through the pin 0 working in the slot 11, the bolt B is shot out and returned at will. When key is removed after looking, the key-plate E is turned so as to hide the holes.

I am aware that it is old to construct a safe- 8 lock with a single plate having on its inner surface guides in which slides a bolt having a transverse slot, and having interposed between the plate and bolt a disk provided with a wrist-pin which engages the slot of the bolt to operate it.

I am also aware that it is old to mount between the front and back plates or sides of a lock-case a bolt having a transverse groove which engages a wrist-pin projecting from one 5 face of theoperating-disk, which is also inclosed between the sides of the case, the bolt being further provided with a longitudinal slot, through which passes the screw or rivet which holds the sides of the case together; but my improved lock differs from these, inasmuch as the essential parts of the lock are comprised of but three piecesna1ne1y,the back plate, the revolving front plate, which is provided with a pin to operate the bolt, and the transversely and longitudinally slotted bolt interposed between the front and back plates.

What I claim is as follows 1. In a lock, the combination, with the back plate and the revolving front plate centrally pivoted thereto by the screw-pin 0, and provided with the projecting pin 0, of the bolt B, 

